Portable terminal having speaker and acoustic output path for speaker

ABSTRACT

An electronic device is provided. The electronic device includes a housing including a first surface facing in a first direction, a second surface facing in a second direction opposite to the first direction, and a side surface member enclosing the first surface and the second surface, a display visible through at least a portion of the first surface, an opening formed on a portion of the first surface, a speaker positioned within the housing, a sensor positioned within the housing, and a first path configured to guide a sound of the speaker to the opening, and a second path configured to guide the sound of the speaker to the opening and to avoid overlapping the first path, and at least a portion of the sensor is positioned between the first path and the second path.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation application of prior application Ser.No. 17/159,826, filed on Jan. 27, 2021, and was based on and claimedpriority under 35 U.S.C. § 119(a) of a Korean patent application number10-2020-0015964, filed on Feb. 10, 2020, in the Korean IntellectualProperty Office, the disclosure of which is incorporated by referenceherein in its entirety.

BACKGROUND 1. Field

The disclosure relates to an electronic device including a speaker.

2. Description of Related Art

As portable terminals are widely used, there are many people who consumecontents such as games, videos, and the like by using portableterminals. People spend more time using portable terminals than watchingtelevision (TV) programs, movies through televisions. Also, many peopleweb surf through portable devices and there is an increasing demand fora large-screen display that may provide much information on a singlescreen. Accordingly, portable devices having a thin bezel to implement alarge-screen display are being released.

The above information is presented as background information only toassist with an understanding of the disclosure. No determination hasbeen made, and no assertion is made, as to whether any of the abovemight be applicable as prior art with regard to the disclosure.

SUMMARY

With the demand for a large-screen display, consumers' standards onperformance of a speaker in a portable terminal are increasing. Usersexpect to have clear and rich sounds when enjoying music or movie byusing portable terminals. Since a space occupied by a speaker in aportable terminal is limited, it is not easy for the speaker provided inthe portable terminal to provide excellent quality sound.

Aspects of the disclosure are to address at least the above-mentionedproblems and/or disadvantages and to provide at least the advantagesdescribed below. Accordingly, an aspect of the disclosure is to providean electronic device which can output a clear and rich sound.Specifically, various embodiments provide a structure that allows asound generated in a speaker positioned within a housing of a portableterminal to be smoothly emitted to the outside of the portable terminal.

The technical object to be achieved by the disclosure is not limited tothat mentioned above, and other technical objects that are not mentionedabove may be clearly understood to those skilled in the art based on thedescription provided below.

Additional aspects will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of the presented embodiments.

In accordance with an aspect of the disclosure, an electronic device isprovided. The electronic device includes a housing including a firstsurface facing in a first direction, a second surface facing in a seconddirection opposite to the first direction, and a side surface memberenclosing the first surface and the second surface, a display visiblethrough at least a portion of the first surface, an opening formed on aportion of the first surface, a speaker positioned within the housing, asensor positioned within the housing, and a first path configured toguide a sound of the speaker to the opening, and a second pathconfigured to guide the sound of the speaker to the opening and to avoidoverlapping the first path, and at least a portion of the sensor ispositioned between the first path and the second path.

Other aspects, advantages, and salient features of the disclosure willbecome apparent to those skilled in the art from the following detaileddescription, which, taken in conjunction with the annexed drawings,discloses various embodiments of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the disclosure will be more apparent from the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is a perspective view illustrating an electronic device accordingto an embodiment of the disclosure;

FIG. 2 is a perspective view illustrating an electronic device of FIG. 1when it is viewed from the back according to an embodiment of thedisclosure;

FIG. 3 is an exploded perspective view of an electronic device accordingto an embodiment of the disclosure;

FIG. 4 is a view illustrating an acoustic output path for guiding asound generated in a speaker of an electronic device to an acousticoutput opening according to an embodiment of the disclosure;

FIG. 5 is a cross-sectional view taken on line I-I of FIG. 4 accordingto an embodiment of the disclosure;

FIG. 6 is a cross-sectional view taken on line II-II of FIG. 4 accordingto an embodiment of the disclosure;

FIG. 7 is a view illustrating a depressed portion formed according to ashape of an acoustic output opening according to an embodiment of thedisclosure;

FIG. 8 is a cross-sectional view taken on line III-III of FIG. 4according to an embodiment of the disclosure; and

FIG. 9 is a cross-sectional view taken on line IV-IV of FIG. 4 accordingto an embodiment of the disclosure.

The same reference numerals are used to represent the same elementsthroughout the drawings.

DETAILED DESCRIPTION

The following description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of variousembodiments of the disclosure as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding but these are to be regarded as merely exemplary.Accordingly, those of ordinary skill in the art will recognize thatvarious changes and modifications of the various embodiments describedherein can be made without departing from the scope and spirit of thedisclosure. In addition, descriptions of well-known functions andconstructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are notlimited to the bibliographical meanings, but, are merely used by theinventor to enable a clear and consistent understanding of thedisclosure. Accordingly, it should be apparent to those skilled in theart that the following description of various embodiments of thedisclosure is provided for illustration purpose only and not for thepurpose of limiting the disclosure as defined by the appended claims andtheir equivalents.

It is to be understood that the singular forms “a,” “an,” and “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “a component surface” includes referenceto one or more of such surfaces.

FIG. 1 is a perspective view illustrating an electronic device 100according to an embodiment of the disclosure.

FIG. 2 is a perspective view illustrating an electronic device of FIG. 1when it is viewed from the back according to an embodiment of thedisclosure.

Referring to FIGS. 1 and 2 , the electronic device 100 according to anembodiment may include a housing 110 including a first surface (or afront surface) 110A, a second surface (or a rear surface) 110B, and aside surface (or a sidewall) 110C enclosing a space between the firstsurface 110A and the second surface 110B. In another embodiment (notshown), the housing may refer to a structure that forms a portion of thefirst surface 110A, the second surface 110B and the side surface 110C ofFIG. 1 .

According to an embodiment, the first surface 110A may be formed by afront surface plate 102 (for example, a glass plate including variouscoating layers, or a polymer plate) having at least a portion thereofsubstantially transparent. According to an embodiment, the front surfaceplate 102 may include a curved portion that is bent from the firstsurface 110A toward a rear surface plate 111 on at least a side edgeportion and is seamlessly extended.

In an embodiment, the second surface 110B may be formed by the rearsurface plate 111 which is substantially opaque. The rear surface plate111 may be formed by, for example, coated or colored glass, ceramic, apolymer, metal (for example, aluminum, stainless steel (STS), ormagnesium), or a combination of at least two of the above-mentionedmaterials. According to an embodiment, the rear surface plate 111 mayinclude a curved portion that is bent from the second surface 110Btoward the front surface plate 102 on at least a side edge portion andis seamlessly extended.

In an embodiment, the side surface 110C may be coupled with the frontsurface plate 102 and the rear surface plate 111, and may be formed by aside surface bezel structure (or a “side surface member or sidewall”)118 including metal and/or a polymer. In a certain embodiment, the rearsurface plate 111 and the side surface bezel structure 118 may beintegrally formed with each other, and may include the same material(for example, a metallic material such as aluminum).

In an embodiment, the electronic device 100 may include at least one ofa display 101, an audio module 103 and 114, a sensor module, a cameramodule 105, a key input device 117, and a connector hole 108. In acertain embodiment, the electronic device 100 may omit at least one (forexample, the key input device 117) of the components or may additionallyinclude other components. For example, the electronic device 100 mayinclude the sensor module which is not illustrated. For example, asensor such as a proximity sensor or an illuminance sensor may beintegrated into the display 101 within an area provided by the frontsurface plate 102, or may be disposed on a position adjacent to thedisplay 101. In a certain embodiment, the electronic device 100 mayfurther include a light emitting element, and the light emitting elementmay be disposed on a position adjacent to the display 101 within an areaprovided by the front surface plate 102. The light emitting element mayprovide state information of the electronic device 100 in the form oflight. In another embodiment, the light emitting element may provide alight source which operates in association with the operation of thecamera module 105. The light emitting element may include, for example,a light emitting diode (LED), an infrared LED (IR LED), and a xenonlamp.

The display 101 may be exposed through a substantial portion of thefront surface plate 102, for example. In a certain embodiment, an edgeof the display 101 may be formed substantially the same as a shape of aborder (for example, a curved surface) of the front surface plate 102that is adjacent to the display. In another embodiment (not shown), agap between the border of the display 101 and the border of the frontsurface plate 102 may be formed substantially the same to extend anexposed area of the display 101. In another embodiment (not shown), arecess or an opening may be formed on a portion of a screen display areaof the display 101, and the electronic device 100 may include otherelectronic components aligned with the recess or the opening, forexample, the camera module 105, a proximity sensor (not shown) or anilluminance sensor (not shown).

In another embodiment (not shown), at least one of a camera module 112and 113, a fingerprint sensor 116, and a flash 106 may be included on aback surface of the screen display area of the display 101. In anotherembodiment (not shown), the display 101 may be coupled with or disposedadjacent to a touch detection circuitry, a pressure sensor for measuringan intensity (pressure) of a touch, and/or a digitizer for detecting astylus pen of a magnetic field method.

In an embodiment, the audio module 103 and 114 may include a microphonehole and a speaker hole. The microphone hole may have a microphonedisposed therein to acquire an external sound, and in a certainembodiment, the microphone hole may have a plurality of microphonesdisposed therein to detect a direction of a sound. In a certainembodiment, the speaker hole and the microphone hole may be implementedas one hole 103, or a speaker (for example, a piezo speaker) may beincluded without a speaker hole. The speaker hole may include anexternal speaker hole or a receiver hole 114 for communication.

The electronic device 100 may include the sensor module which is notillustrated, thereby generating an electric signal or a data valuecorresponding to an internal operation state or an external environmentstate. The sensor module may further include a proximity sensor disposedon the first surface 110A of the housing 110, a fingerprint sensorintegrated into or disposed adjacent to the display 101, and/or abiometric sensor (for example, a heart rate monitor (HRM) sensor)disposed on the second surface 110B of the housing 110. The electronicdevice 100 may further include a sensor module (not shown), for example,at least one of a gesture sensor, a gyro sensor, an atmospheric pressuresensor, a magnetic sensor, an acceleration sensor, a grip sensor, acolor sensor, an infrared (IR) sensor, a biometric sensor, a temperaturesensor, a humidity sensor, or an illuminance sensor.

In an embodiment, the camera module 105, 112, 113 and 106 may include afirst camera device disposed on the first surface 110A of the electronicdevice 100, a second camera device 112 and 113 disposed on the secondsurface 110B, and/or the flash 106. The camera devices 105, 112 and 113may include one lens or a plurality of lenses, an image sensor, and/oran image signal processor. The flash 106 may include, for example, alight emitting diode or a xenon lamp. In a certain embodiment, two ormore lenses (an infrared camera, a wide angle lens and a telephoto lens)and image sensors may be disposed on one surface of the electronicdevice 100.

In an embodiment, the key input device 117 may be disposed on the sidesurface 110C of the housing 110. In another embodiment, the electronicdevice 100 may not include a portion or an entirety of theabove-mentioned key input device 117, and the key input device 117 thatis not included may be implemented on the display 101 in other formssuch as a soft key. In a certain embodiment, the key input device mayinclude at least a portion of the fingerprint sensor 116 disposed on thesecond surface 110B of the housing 110.

In an embodiment, the connector hole 108 may accommodate a connector fortransmitting and receiving power and/or data to and from an externalelectronic device, and/or a connector for transmitting and receiving anaudio signal to and from an external electronic device. For example, theconnector hole 108 may include a USB connector or an earphone jack.

FIG. 3 is an exploded perspective view of an electronic device accordingto an embodiment of the disclosure.

Referring to FIG. 3 , an electronic device 200 may include a sidesurface bezel structure 210, a mid-plate 211 (for example, a bracket), afront surface plate 220, a display 230, a printed circuit board 260, aspeaker 270, at least one sensor 280, and a rear surface plate 290. In acertain embodiment, the electronic device 200 may omit at least one ofthe components or may additionally include other components. At leastone of the components of the electronic device 200 may be the same as orsimilar to at least one of the components of the electronic device 100of FIG. 1 or 2 , and a redundant explanation will be omitted.

In an embodiment, the mid-plate 211 may be disposed within theelectronic device 200 to be connected with the side surface bezelstructure 210, or may be integrally formed with the side surface bezelstructure 210. The mid-plate 211 may be formed with, for example, ametallic material and/or a nonmetallic material (for example, apolymer). The display 230 may be coupled to one surface of the mid-plate211, and the printed circuit board 260 may be coupled to the othersurface of the mid-plate 211.

In an embodiment, the electronic device 200 may include the frontsurface plate 220 attached to the display 230. In an embodiment, thefront surface plate 220 and the display 230 may be one component (forexample, a display module).

In an embodiment, the electronic device 200 may include a protectionlayer 240 attached to a back surface of the display 230. In anembodiment, the protection layer 240 may include components forprotecting the display 230 or guaranteeing heat emission performance ofthe display 230. For convenience of explanation, the display 230 of thedisclosure may be understood as a concept including the protection layer240. For example, the display 230, the front surface plate 220, and theprotection layer 240 may be one component (for example, a displaymodule).

In an embodiment, an adhesive member 250 may be attached between thedisplay 230 and the mid-plate 211. In an embodiment, a portion of theadhesive member 250 may be attached between the front surface plate 220and the mid-plate 211. For example, a portion of the adhesive member 250may be attached between the display 230 and the mid-plate 211, and theother portion may be attached between the front surface plate 220 andthe mid-plate 211. In an embodiment, the adhesive member 250 may beattached between the mid-plate 211 and the display 230 (or the frontsurface plate 220) along a boundary of the mid-plate 211. In anembodiment, a portion of the adhesive member 250 may be attached betweenthe protection layer 240 attached to the back surface of the display 230and the mid-plate 211.

In an embodiment, the adhesive member 250 may include a waterprooffunction. The adhesive member 250 may seal a gap between the mid-plate211 and the display 230 (or the front surface plate 220, the protectionlayer 240) to prevent foreign substances from entering the electronicdevice 200 through the gap between the mid-plate 211 and the display 230(or the front surface plate 220, the protection layer 240).

In an embodiment, the printed circuit board 260 may have a processor, amemory, and/or an interface mounted thereon. The processor may include,for example, one or more of a central processing device, an applicationprocessor, a graphic processing device, an image signal processor, asensor hub processor, or a communication processor.

In an embodiment, the speaker 270 may be electrically connected with theprocessor to receive an acoustic signal from the processor. The speaker270 may generate a sound by vibrating a driver according to the acousticsignal. The sound generated in the driver of the speaker 270 may bepropagated to an acoustic output opening (for example, the receiver hole114 of FIG. 1 ) through an acoustic output path (or a duct, a channel).

In an embodiment, the speaker may be disposed on the mid-plate 211. Forexample, the speaker may be assembled with (or mounted on) the printedcircuit board 260, or may be connected with the printed circuit board260 through a flexible connector. When the printed circuit board 260 isassembled on the mid-plate 211, the speaker may be positioned on themid-plate 211.

In an embodiment, the electronic device 200 may include at least onesensor 280 positioned on the mid-plate 211. For example, the at leastone sensor 280 may be assembled with (or mounted on) the printed circuitboard 260, or may be connected with the printed circuit board 260through a flexible connector. When the printed circuit board 260 isassembled on the mid-plate 211, the at least one sensor 280 may bepositioned on the mid-plate 211. The at least one sensor 280 mayinclude, for example, a camera sensor, an illuminance sensor, or aproximity sensor. In an embodiment, the at least one sensor 280 may bedisposed on the back surface of the display 230. For example, an imagesensor for a front-facing camera may be positioned on the back surfaceof the display 230. In this case, the display 230 may include an opening(for example, an opening aligned with the camera module 105 of FIG. 1 )corresponding to an angle of view of the front-facing camera.

FIG. 4 illustrates an acoustic output path (or a duct, a channel) forguiding a sound generated in a speaker of an electronic device to anacoustic output opening according to an embodiment of the disclosure.

Referring to FIG. 4 , the mid-plate 211 may include an acoustic outputpath, and the adhesive member 250 may be positioned on the mid-plate211. In the illustrated embodiment, the front surface plate 220 isdisplayed transparently, and the display 230 and the protection layer240 are omitted.

In an embodiment, an acoustic output opening 303 may be positioned on aboundary of the front surface plate 220. In an embodiment, the acousticoutput opening 303 may be formed lengthways in a horizontal directionalong a portion of the boundary of the front surface plate 220.

In an embodiment, the front surface plate 220 may include a cutoutportion (or a recess) 221 formed on a boundary thereof. A gap may beformed between the front surface plate 220 and the side surface bezelstructure 210 due to the cutout portion 221 of the front surface plate220. The acoustic output opening 303 may include a gap formed by thecutout portion 221 of the front surface plate 220.

In an embodiment, the electronic device 200 may include an acousticchamber 300 positioned on an acoustic source (for example, the driver ofthe speaker 270). The acoustic chamber 300 may be implemented by a spacebetween the display 230 and the mid-plate 211. In an embodiment, themid-plate 211 may include a depressed portion 212 (for example, arecess) formed on a surface thereof facing the display 230, and a spacesurrounded by the depressed portion 212 may function as the acousticchamber 300. For example, the mid-plate 211 may include the depressedportion 212 including a bottom surface formed one surface thereof tohave a height lower than the periphery, and a sidewall extended from thebottom surface toward the display 230. The space surrounded by thedepressed portion 212 may refer to a space that is surrounded by thebottom surface and the sidewall of the depressed portion 212.

In an embodiment, the mid-plate 211 may be positioned between the driver271 of the speaker 270 and the display 230. Referring to FIG. 5 , thedriver 271 of the speaker 270 may be installed under the mid-plate 211.In this case, the driver 271 of the speaker 270 may be connected withthe acoustic chamber 300 formed between the mid-plate 211 and thedisplay 230 through an opening 218 penetrating through the mid-plate211.

In an embodiment, the acoustic chamber 300 may be connected with theacoustic output opening 303 through acoustic output paths 301 and 302.In an embodiment, the electronic device 200 may include the acousticoutput paths 301 and 302 to guide a sound generated in the driver 271 ofthe speaker 270 to the acoustic output opening 303.

In an embodiment, the electronic device 200 may include a plurality ofacoustic output paths 301 and 302. For example, the electronic device200 may include a first acoustic output path 301, a second acousticoutput path 302. In an embodiment, the acoustic chamber 300 may beconnected with the plurality of acoustic output paths 301 and 302. Forexample, the acoustic chamber 300 may include a plurality of emissionexits 300 a and 300 b, and the plurality of emission exits 300 a and 300b may propagate the sound to the plurality of acoustic output paths 301and 302, respectively. According to the illustrated embodiment, theacoustic chamber 300 may include a first emission exit 300 a and asecond emission exit 300 b. The first emission exit 300 a and the secondemission exit 300 b may be connected with the first acoustic output path301 and the second acoustic output path 302, respectively. A portion ofthe sound generated in the driver 271 of the speaker 270 that exits fromthe first emission exit 300 a/second emission exit 300 b of the acousticchamber 300 may be propagated to the acoustic output opening 303 throughthe first/second acoustic output paths 301/302.

The electronic device 200 may include three or more acoustic outputpaths although they are not illustrated in FIG. 4 . For example, thethree or more acoustic output paths may be configured to be extendedfrom the acoustic chamber 300 toward the acoustic output opening 303.

In an embodiment, the first acoustic output path 301 and the secondacoustic output path 302 may not overlap each other. For example, afirst sound propagated to the first acoustic output path 301 and asecond sound propagated to the second acoustic output path 302 may notbe mixed with each other until they arrive at the acoustic outputopening 303.

In an embodiment, the plurality of acoustic output paths 301 and 302 mayguide the sound of the speaker 270 to various portion of the acousticoutput opening 303. For example, when the acoustic output opening 303 isextended from a first portion toward a second portion, the firstacoustic output path 301 may guide the sound of the speaker 270 to thefirst portion of the acoustic output opening 303, and the secondacoustic output path 302 may guide the sound of the speaker 270 to thesecond portion of the acoustic output opening 303.

In an embodiment, the acoustic output paths 301 and 302 may beimplemented by a space formed between the mid-plate 211 and the display.In an embodiment, the mid-plate 211 may include depressed portions 213and 214 (for example, a recess, a groove), and the depressed portions213, 214 may be extended from the driver 271 of the speaker 270 to theacoustic output opening 303. Referring to FIG. 5 , the sound emittedfrom the driver 271 of the speaker 270 may be propagated to the acousticoutput opening 303 through a space guaranteed by the depressed portion213 of the mid-plate 211 in the acoustic chamber 300. For example, themid-plate 211 may include the depressed portion 213 including a bottomsurface lower than the periphery thereof, and a sidewall extended fromthe bottom surface toward the display 230. The sound emitted from theacoustic chamber 300 may be propagated to the acoustic output opening303 through the medium of air existing in a space surrounded by thebottom surface and the sidewall of the depressed portion 213.

According to an embodiment, since the first acoustic output path 301 andthe second acoustic output path 302 are separated from each other, thefirst acoustic output path 301 and the second acoustic output path 302may be configured to output sounds of different registers, respectively.In this case, the speaker 270 may include two or more drivers topropagate sounds to the first acoustic output path 301 and the secondacoustic output path 302, respectively. For example, a first driverresponsible for a low register may be connected with the first acousticoutput path 301, and a second diver responsible for a high register maybe connected with the second acoustic output path 302. In this case, thefirst driver and the second driver may propagate sounds to the acousticchamber 300 which is divided, respectively. For example, the acousticchamber 300 may include a first acoustic chamber and a second acousticchamber which are spatially divided by a partition, and driversresponsible for different registers may be acoustically connected to therespective acoustic chambers.

In an embodiment, the depressed portions 213 and 214 providing theacoustic output paths 301 and 302 may be designed in shapes appropriateto characteristics of sounds emitted through corresponding acousticoutput paths 301 and 302. For example, the first depressed portion 213may have a structure (for example, a width, a depth, a length of a path,etc.) appropriate for emitting a sound of a low register, and the seconddepressed portion 214 may have a structure appropriate for emitting asound of a high register. If registers dealt with by the plurality ofacoustic output paths 301 and 302 are different, a resolution of a soundfinally outputted from the acoustic output opening 303 may increase.

In an embodiment, the mid-plate 211 may include the first depressedportion 213 and the second depressed portion 214 which are extended fromthe acoustic chamber 300. In this case, the first acoustic output path301 may include a space surrounded by the first depressed portion 213,and the second acoustic output path 302 may include a space surroundedby the second depressed portion 214.

In an embodiment, the electronic device 200 may include at least onesensor 280 positioned under the display 230. For example, an electroniccomponent for receiving external light of the electronic device 200,such as a camera module, an image sensor, an illuminance sensor, aproximity sensor, etc., may be positioned under the display 230.

In an embodiment, the at least one sensor 280 may be positioned betweenthe acoustic output opening 303 and the acoustic chamber 300. In anembodiment, at least a portion of the at least one sensor 280 may bepositioned on the same plane or substantially the same plane as theacoustic output paths 301 and 302. Accordingly, the depressed portions213 and 214 providing the acoustic output paths 301 and 302 may beformed to detour around an area where the at least one sensor 280 ispositioned.

In an embodiment, the mid-plate 211 may include a first surface 211 a onwhich the sensor is positioned, and a second surface 211 b which isseparated from the first surface 211 a by the depressed portion (thatis, the acoustic output paths 301 and 302 and the acoustic chamber 300).In an embodiment, the first surface 211 a and the second surface 211 bmay be formed higher than the bottom surface of the depressed portion(i.e., the acoustic output paths 301 and 302 and the acoustic chamber300).

In an embodiment, the acoustic output paths 301 and 302 may surround aportion of a boundary of the first surface 211 a of the mid-plate 211 onwhich the at least one sensor 280 is disposed. For example, the acousticchamber 300, the first acoustic output path 301, and the second acousticoutput path 302 may surround a portion of the boundary of the firstsurface 211 a. According to the embodiment illustrated in FIG. 4 , theat least one sensor 280 may be positioned within a closed curve linepassing through the first acoustic output path 301, the second acousticoutput path 302, the acoustic chamber 300, and the acoustic outputopening 303.

In an embodiment, the first surface 211 a and the second surface 211 bof the mid-plate 211 may be attached to the protection layer 240 throughthe adhesive member 250. In an embodiment, the adhesive member 250 maybe attached to a portion adjacent to the boundary of the first surface211 a, and a portion adjacent to the boundary of the second surface 211b. In an embodiment, the adhesive member 250 may include a waterprooffunction. In this case, the adhesive member 250 may have a width enoughto ensure waterproof performance. The adhesive member 250 may bepositioned between the mid-plate 211 and the protection layer 240 toseal a gap between the mid-plate 211 and the protection layer 240. Theadhesive member 250 can prevent foreign substances entering between theprotection layer 240 and the side surface bezel structure 210 frompermeating into the sensor.

In an embodiment, the adhesive member 250 may include a sensor part 251attached between the mid-plate 211 and the protection layer 240 alongthe boundary of the first surface 211 a, and a main part 252 attachedbetween the mid-plate 211 and the protection layer 240 along theboundary of the second surface 211 b.

Since the first surface 211 a and the second surface 211 b of themid-plate 211 are separated from each other by the depressed portion(for example, the first acoustic output path 301, the second acousticoutput path 302, and the acoustic chamber 300), the sensor part 251 andthe main part 252 of the adhesive member 250 may be attached to thefirst surface 211 a and the second surface 211 b, respectively, whilebeing separated from each other. However, if the sensor part 251 isattached separately from the main part 252, a problem may arise. Forexample, if the sensor part 251 has a relatively smaller size than themain part 252, the sensor part 251 may be lost in a manufacturingprocess of attaching the adhesive member to the mid-plate 211, thedisplay 230, or the front surface plate 220. In another example, if thesensor part has a small size, a product durability (reliability) problemmay arise due to an external environment condition (falling or atemperature condition such as a thermal shock). If adhesion is low dueto narrow width of a tape, shoving may occur in an external temperaturecondition or a condition like falling and thus the waterproof functionmay be degraded. Accordingly, the sensor part 251 attached to the firstsurface 211 a of the mid-plate 211 and the main part 252 attached to thesecond surface 211 b of the mid-plate 211 may need to be integrallyformed with each other.

Referring to FIG. 4 , the adhesive member 250 may include a bridge part253 to connect the main part 252 and the sensor part 251. In anembodiment, the bridge part 253 may be extended from the main part 252and may be connected to the sensor part 251 across the acoustic outputpaths 301 and 302. For example, one end of the bridge part 253 may beconnected with a boundary of the main part 252 and the other end may beconnected with a boundary of the sensor part 251. In an embodiment, onesurface of the bridge part 253 may be attached to the protection layer240, and the other surface may face the first acoustic output path 301.The bridge part 253 may have a width enough to prevent the sensor part251 and the main part 252 from being separated from each other in amanufacturing process.

In the illustrated embodiment, the bridge part 253 may be positionedover the first acoustic output path 301. However, embodiments of thedisclosure are not limited thereto. For example, the bridge part 253 maybe positioned over the second acoustic output path 302. In anotherexample, at least one bridge part may be positioned over the acousticchamber 300, the first acoustic output path 301, and/or the secondacoustic output path 302.

FIG. 5 is a cross-sectional view taken on line I-I of FIG. 4 accordingto an embodiment of the disclosure.

FIG. 6 is a cross sectional view take on line II-II of FIG. 4 accordingto an embodiment of the disclosure.

The cross section taken on line II indicates the acoustic output paths301, 302 from the driver 271 of the speaker 270 to the acoustic outputopening 303, and the cross section taken on line II-II indicates a crosssection perpendicular to an acoustic propagation direction.

Referring to FIG. 5 , a sound of the speaker 270 may be propagated tothe acoustic output opening 303 through a space between the mid-plate211 and the protection layer 240. Vibrations of air caused by the driver271 of the speaker 270 may be propagated to the acoustic output opening303 through the air existing in the space (that is, the first acousticoutput path 301) between the mid-plate 211 and the protection layer 240.

In the illustrated embodiment, the bridge part 253 may be positionedover the first acoustic output path 301. Since the adhesive member 250generally includes an adhesive ingredient on a surface thereof, externalforeign substances may be attached to a surface of the bridge part 253.If foreign substances are attached to the bridge part 253, an areaallowing a sound to pass therethrough may be reduced, and acousticquality of the speaker 270 may be degraded. Accordingly, in anembodiment, the electronic device 200 may include a masking tape 254attached under the bridge part 253.

In an embodiment, the masking tape 254 may include a surface that has noadhesive ingredient. When the masking tape 254 is attached to the bridgepart 253, the surface of the masking tape 254 that has no adhesiveingredient may face the first acoustic output path 301. Since a surfaceof the bridge part 253 that includes an adhesive ingredient is notexposed to the first acoustic output path 301, foreign substance can beprevented from being attached to the adhesive member 250, andaccordingly, acoustic quality of the speaker 270 can be enhanced.

Referring to FIG. 6 , the bridge part 253 and the masking tape 254 mayoccupy some area of the first acoustic output path 301. When a soundpropagated through the first acoustic output path 301 passes through aportion where the bridge part 253 exists, an area allowing the sound topass therethrough may be reduced as much as cross sections of the bridgepart 253 and the masking tape 254. In an embodiment, the electronicdevice 200 may further include an additional depressed portion 215formed on a portion of the first acoustic output path 301 thatcorresponds to the bridge part 253. The depressed portion 215 providesan additional space 304 to the first acoustic output path 301, so thatthe electronic device 200 can compensate for the emission space of thesound reduced by the bridge part 253 and the masking tape 254.

For example, the first acoustic output path 301 may include the firstdepressed portion 213 (or a groove) extended from the acoustic chamber300 to the acoustic output opening 303, and may include the thirddepressed portion 215 (or a recess) formed on a bottom of a portion ofthe groove that corresponds to the bridge part 253. In an embodiment,the third depressed portion 215 may have a depth corresponding tothicknesses of the bridge part 253 and the masking tape 254. In anembodiment, a length of the third depressed portion 215 may be longerthan a width of the bridge part 253. In an embodiment, a width of thethird depressed portion 215 may be equal to or smaller than a width ofthe first depressed portion 213. An area (or space) allowing a sound topass therethrough can be guaranteed by the third depressed portion 215formed on the bottom surface of the first depressed portion 213.

In the embodiment illustrated in FIGS. 5 and 6 , the masking tape 254may be attached to one surface of the bridge part 253, but embodimentsof the disclosure are not limited thereto. If the adhesive ingredientincluded in the surface of the bridge part 253 is removed, the maskingtape 254 does not need to be attached to one surface of the bridge part253. In this case, the third depressed portion 215 may have a depthcorresponding to the thickness of the bridge part 253.

The acoustic output opening 303 may have a shape extended widthways.Since a vertical length of the acoustic output opening 303 is narrow, aspace enough to allow a sound to exit therefrom should be guaranteed. Astructure providing an additional space 305 to the acoustic output paths301 and 302 will be described in FIGS. 7 and 8 .

FIG. 7 illustrates a depressed portion formed according to a shape of anacoustic output opening according to an embodiment of the disclosure.

FIG. 8 is a cross-sectional view taken on line III-III of FIG. 4according to an embodiment of the disclosure.

Referring to FIG. 7 , the first acoustic output path 301 of theelectronic device 200 may include a space 305 that is guaranteed by thedepressed portion 216 (for example, a recess, a groove) positioned on aportion adjacent to the acoustic output opening 303 of the mid-plate211. The space 305 guaranteed by the depressed portion 216 may form anend of the first acoustic output path 301.

In an embodiment, the depressed portion 216 may be configured tocorrespond to the shape of the acoustic output opening 303. In anembodiment, the depressed portion 216 may be extended along the acousticoutput opening 303. For example, the depressed portion 216 may have alength corresponding to a portion of the acoustic output opening 303. Inan embodiment, the depressed portion 216 may have a depth shallower thanthe other depressed portions (for example, the first depressed portion213, the second depressed portion 214, the third depressed portion 215)forming the acoustic output paths 301 and 302. For example, the fourthdepressed portion 216 which is extended from an end of the firstdepressed portion 213/the second depressed portion 214 and has a shapecorresponding to the acoustic output opening 303 may include a bottomsurface higher than the first depressed portion 213. A sound emittedfrom the driver 271 of the speaker 270 and passing through the firstdepressed portion 213/the second depressed portion 214 may be propagatedto the space 305 formed by the fourth depressed portion 216. Since thefourth depressed portion 216 has a shape corresponding to the acousticoutput opening 303, the sound of the driver 271 of the speaker 270 maysmoothly exit to the acoustic output opening 303.

In the same way as described in FIG. 4 , the adhesive member 250 may beattached between the mid-plate 211 and the display along an area(hereinafter, a boundary area) adjacent to the boundary of the secondsurface 211 b of the mid-plate 211. In an embodiment, the adhesivemember 250 may not be attached to a portion of the boundary area of thesecond surface 211 b.

Referring to FIG. 8 , a portion of the main part 252 of the adhesivemember 250 may be spaced apart from the fourth depressed portion 216 bya predetermined distance d1. Accordingly, a space 306 corresponding to athickness of the adhesive member 250 may be formed between theprotection layer 240 and the mid-plate 211. Referring to FIG. 8 alongwith FIG. 7 , in an embodiment, the adhesive member 250 disposed betweenthe mid-plate 211 and the protection layer 240 may be spaced apart fromthe boundary of the second surface 211 b or the fourth depressed portion216. Accordingly, there may exist a portion without the adhesive member250 between the boundary area of the second surface 211 b of themid-plate 211, and the protection layer 240. Accordingly, the electronicdevice 200 may include the space 306 between the second surface 211 b ofthe mid-plate 211 and the protection layer 240 as a portion of the firstacoustic output path 301.

Referring to FIG. 8 , a portion of a boundary of the protection layer240 in an embodiment may be spaced apart from a boundary of the display230 by a predetermined distance d2. In an embodiment, the protectionlayer 240 may include a cutout portion 241 on the boundary thereof. Inan embodiment, the protection layer 240 may include the cutout portion241 formed on a portion of the boundary of the protection layer 240 thatcorresponds to the acoustic output opening 303. In an embodiment, thecutout portion 241 of the protection layer 240 may provide an additionalspace 307 to allow a sound to propagate therethrough. The first acousticoutput path 301 may include the space 307 guaranteed by the cutoutportion 241 of the protection layer 240. In the illustrated embodiment,a portion of the boundary area of the display 230 may be exposed to thefirst acoustic output path 301 through the cutout portion 241 of theprotection layer 240.

Referring to FIG. 8 , the electronic device 200 may include an emptyspace between boundary portions (that is, portions adjacent to theacoustic output opening 303) of the front surface plate 220 and thedisplay 230, and the mid-plate 211, as the acoustic output paths 301,302. Accordingly, a portion of the boundary portions of the frontsurface plate 220 and the display 230 may not be supported by themid-plate 211. When an external force is applied to the portion that isnot supported by the mid-plate 211, the front surface plate 220 or thedisplay 230 may be damaged.

FIG. 9 is a cross-sectional view taken on line IV-IV of FIG. 4 , andillustrates a structure supporting the boundary portions of a frontsurface plate and a display according to an embodiment of thedisclosure.

Referring to FIG. 9 , in an embodiment, the first surface 211 a of themid-plate 211 may be attached to the protection layer 240 through thesensor part 251 of the adhesive member 250. Referring to FIG. 9 alongwith FIG. 4 , the sensor part 251 of the adhesive member 250 in anembodiment may include a portion 251 extended toward the acoustic outputopening 303. The extended portion 251 a of the sensor part 251 may filla space between the first surface 211 a of the mid-plate 211 and theprotection layer 240.

In an embodiment, the main part 252 of the adhesive member 250 maysupport portions of the display 230 adjacent to the acoustic outputopening 303 on both sides. In an embodiment, the extended portion 251 aof the sensor part 251 may support a center portion of the display 230.Since portions of the display 230 adjacent to the acoustic outputopening 303 may be supported not only by the main part 252 but also bythe sensor part 251, sagging of the front surface plate 220 and/or thedisplay 230 can be reduced.

In various embodiments described above, an electronic device (forexample, the electronic device 200 of FIG. 3 ) may include: a housingincluding a first surface facing in a first direction, a second surfacefacing in a second direction opposite to the first direction, and a sidesurface member (for example, the side surface bezel structure 210 ofFIG. 3 ) enclosing the first surface and the second surface; a display(for example, the display 230 of FIG. 3 ) visible through at least aportion of the first surface; an opening (for example, the acousticoutput opening 303 of FIG. 4 ) formed on a portion of the first surface;a speaker (for example, the speaker 270 of FIG. 3 ) positioned withinthe housing; a sensor (for example, the at least one sensor 280 of FIG.3 ) positioned within the housing; and a first path (for example, thefirst acoustic output path 301 of FIG. 4 ) configured to guide a soundof the speaker to the opening, and a second path (for example, thesecond acoustic output path 302 of FIG. 4 ) configured to guide thesound of the speaker to the opening and to avoid overlapping the firstpath, and at least a portion of the sensor may be positioned between thefirst path and the second path.

In an embodiment, at least a portion of the sensor may be positionedbetween the opening and the speaker.

In an embodiment, the electronic device may further include a mid-plate(for example, the mid-plate 211 of FIG. 3 ) positioned on a back surfaceof the display, and the mid-plate may include a first depressed portion(for example, the first depressed portion 213 of FIG. 4 ) and a seconddepressed portion (for example, the second depressed portion 214 of FIG.4 ) which are extended from the speaker toward the opening on a surfacethereof facing the display, and the first path may include a spacesurrounded by the first depressed portion, and the second path mayinclude a space surrounded by the second depressed portion.

In an embodiment, the electronic device may further include an adhesivemember (for example, the adhesive member 250 of FIG. 4 ) attachedbetween the mid-plate and the display, and the mid-plate may include afirst surface (for example, the first surface 211 a of FIG. 4 ) on whichthe sensor is positioned, and a second surface (for example, the secondsurface 211 b) which is separated from the first surface by the firstpath and the second path, and the adhesive member may include a firstpart (for example, the sensor part 251 of FIG. 4 ) which is attachedbetween the mid-plate and the display along a boundary of the firstsurface, a second part (for example, the main part 252 of FIG. 4 ) whichis attached between the mid-plate and the display along a boundary ofthe second surface, and a third part (for example, the bridge part 253of FIG. 4 ) which is extended from a portion of the first part to aportion of the second part, and the third part may be positioned overthe first path or the second path.

In an embodiment, one surface of the third part may face the display,and the other surface may face the first path or the second path, andthe other surface of the third part may be devoid of an adhesiveingredient or may be attached to a masking tape (for example, themasking tape 254 of FIG. 5 ).

In an embodiment, the mid-plate may include a third depressed portion(for example, the third depressed portion 215 of FIG. 4 ) formed on abottom surface of a position of the first path or the second path thatcorresponds to the third part.

In an embodiment, a portion of the second part may be spaced apart froma boundary of the second surface, and the first path or the second pathmay include a space that is guaranteed between the second surface andthe display as the second part is spaced apart from a boundary of thesecond surface.

In an embodiment, the first part may further include a portion (forexample, the extended portion 251 a of FIG. 4 ) that is extended from aboundary thereof toward the opening.

In an embodiment, the mid-plate may include a fourth depressed portion(for example, the fourth depressed portion 216 of FIG. 7 ) formed on aportion thereof adjacent to the opening, and the first path and/or thesecond path may include a space (for example, the space 305 of FIG. 7 )surrounded by the fourth depressed portion.

In an embodiment, the fourth depressed portion may have a depthshallower than the first depressed portion or the second depressedportion.

In an embodiment, the mid-plate and the side surface member may beintegrally formed with each other.

In an embodiment, a driver of the speaker may be positioned on a surfaceof the mid-plate that faces opposite to the display, and the driver ofthe speaker may be configured to propagate a sound to the first path andthe second path through an opening (for example, the opening 218 of FIG.4 ) of the mid-plate.

In an embodiment, the electronic device may further include a frontsurface plate (for example, the front surface plate 220 of FIG. 3 )attached onto the display to form a portion of the first surface, aportion of a boundary of the front surface plate may be spaced apartfrom the side surface member to form a gap between the front surfaceplate and the side surface member, and the opening may include the gapbetween the front surface plate and the side surface member.

In an embodiment, the front surface plate may include a cutout portion(for example, the cutout portion 221 of FIG. 4 ) formed on a boundarythereof, and the gap between the front surface plate and the sidesurface member may correspond to the cutout portion.

In an embodiment, the electronic device may further include an acousticchamber (for example, the acoustic chamber 300 of FIG. 4 ) correspondingto the speaker within the housing, the first path may be extended from afirst exit (for example, the first emission exit 300 a of FIG. 4 ) ofthe acoustic chamber, and the second path may be extended from a secondexit (for example, the second emission exit 300 b of FIG. 4 ) of theacoustic chamber.

In an embodiment, the opening may be extended from a first portion to asecond portion, and the first path may guide a sound of the speaker tothe first portion of the opening, and the second path may guide thesound of the speaker to the second portion of the opening.

In an embodiment, the sensor may be positioned within a closed curveline passing through the first path, the second path, and the opening.

In an embodiment, the electronic device may further include a protectionlayer (for example, the protection layer 240 of FIG. 3 ) attached to aback surface of the display, the protection layer may include a cutoutportion (for example, the cutout portion 241 of FIG. 7 ) formed aportion of a boundary thereof, and the first path or the second path mayinclude a space (for example, the space 307 of FIG. 7 ) that isguaranteed by the cutout portion.

In an embodiment, the sensor may include at least one of an imagesensor, a proximity sensor, or an illuminance sensor.

In an embodiment, the sensor may be an image sensor of a camerapositioned within the housing, and the display may include an openingcorresponding an angle of view of the camera.

The electronic device 200 according to various embodiments disclosed inthe disclosure may be various types of electronic devices. Theelectronic device 200 may include, for example, a portable communicationdevice (for example, a smartphone), a computer device, a portablemultimedia device, a portable medical device, a camera, a wearabledevice, or a home appliance. The electronic device 200 according to anembodiment of the disclosure is not limited to the above-mentioneddevices.

The electronic device according to various embodiments of the disclosurecan smoothly output a sound of the speaker embedded therein to theacoustic output opening. As a space allowing the sound of the speaker topropagate therethrough is guaranteed, a user can enjoy a clear and richsound by using the portable device.

The effect achieved by the disclosure is not limited to that mentionedabove, and other effects that are not mentioned above may be clearlyunderstood to those skilled in the art based on the description providedabove.

It should be appreciated that various embodiments of the disclosure andterms used therein are not intended to limit the technological featuresset forth herein to particular embodiments, and include variousmodifications, equivalents, or alternatives of embodiments of thedisclosure. With regard to the description of the drawings, similarreference numerals may be used to refer to similar elements. A singularform of a noun corresponding to an item may include one item or aplurality of items unless otherwise specified. In the disclosure, theexpressions “A or B,” “at least one of A and B,” “at least one of A orB,” “A, B, or C,” “at least one of A, B, and C,” and “at least one of A,B, or C” may include any one or all possible combinations of the itemsenumerated together. As used herein, such terms as “1st” and “2nd,” or“first” and “second” may be used to simply distinguish a correspondingcomponent from another, and does not limit the components in otheraspect (e.g., importance and/or order). It is to be understood that ifan element (e.g., a first element) is referred to, with or without theterm “operatively” or “communicatively”, as “coupled with,” “coupledto,” “connected with,” or “connected to” another element (e.g., a secondelement), it means that the element may be coupled with the otherelement directly (e.g., wiredly), wirelessly, or via a third element.

While the disclosure has been shown and described with reference tovarious embodiments thereof, it will be understood by those skilled inthe art that various changes in form and details may be made thereinwithout departing from the spirit and scope of the disclosure as definedby the appended claims and their equivalents.

What is claimed is:
 1. An electronic device comprising: a housingcomprising: a first surface facing in a first direction, a secondsurface facing in a second direction opposite to the first direction,and a side surface member enclosing the first surface and the secondsurface; a display visible through at least a portion of the firstsurface; an opening formed on a portion of the first surface; a speakerpositioned within the housing; a sensor positioned within the housing; afirst path configured to guide a sound of the speaker to the opening;and a second path configured to guide the sound of the speaker to theopening and to avoid overlapping the first path, wherein, when theelectronic device is viewed from a front, at least a portion of thesensor is positioned between the first path and the second path, and ispositioned between the opening and the speaker.
 2. The electronic deviceof claim 1, further comprising: a mid-plate positioned on a back surfaceof the display, wherein the mid-plate comprises a first depressedportion and a second depressed portion which are extended from thespeaker toward the opening on a surface thereof facing the display, andwherein the first path comprises a space surrounded by the firstdepressed portion, and the second path comprises a space surrounded bythe second depressed portion.
 3. The electronic device of claim 2,further comprising: an adhesive member attached between the mid-plateand the display, wherein the mid-plate comprises a first mid-platesurface on which the sensor is positioned, and a second mid-platesurface, the second mid-plate surface being separated from the firstmid-plate surface by the first path and the second path, and wherein theadhesive member comprises a first part which is attached between themid-plate and the display along a boundary of the first surface, asecond part which is attached between the mid-plate and the displayalong a boundary of the second surface, and a third part which isextended from a portion of the first part to a portion of the secondpart, the third part being positioned over the first path or the secondpath.
 4. The electronic device of claim 3, wherein one surface of thethird part faces the display, and another surface of the third partfaces the first path or the second path, and wherein the other surfaceof the third part is devoid of an adhesive ingredient or is attached toa masking tape.
 5. The electronic device of claim 3, wherein themid-plate comprises a third depressed portion formed on a bottom surfaceof a position of the first path or the second path that corresponds tothe third part.
 6. The electronic device of claim 3, wherein a portionof the second part is spaced apart from a boundary of the secondmid-plate surface, and wherein the first path or the second pathcomprises a space that is guaranteed between the second surface and thedisplay as the second part is spaced apart from a boundary of the secondsurface.
 7. The electronic device of claim 3, wherein the first partfurther comprises a portion that is extended from a boundary thereoftoward the opening.
 8. The electronic device of claim 3, wherein themid-plate comprises a fourth depressed portion formed on a portionthereof adjacent to the opening, and wherein at least one of the firstpath or the second path comprises a space surrounded by the fourthdepressed portion.
 9. The electronic device of claim 8, wherein thefourth depressed portion has a depth shallower than the first depressedportion or the second depressed portion.
 10. The electronic device ofclaim 2, wherein the mid-plate and the side surface member areintegrally formed with each other.
 11. The electronic device of claim 2,wherein a driver of the speaker is positioned on a surface of themid-plate that faces opposite to the display, and wherein the driver ofthe speaker is configured to propagate a sound to the first path and thesecond path through an opening of the mid-plate.
 12. The electronicdevice of claim 1, further comprising: a front surface plate attachedonto the display to form a portion of the first surface, wherein aportion of a boundary of the front surface plate is spaced apart fromthe side surface member to form a gap between the front surface plateand the side surface member, and wherein the opening comprises the gapbetween the front surface plate and the side surface member.
 13. Theelectronic device of claim 12, wherein the front surface plate comprisesa cutout portion formed on a boundary thereof, and wherein the gapbetween the front surface plate and the side surface member correspondsto the cutout portion.
 14. The electronic device of claim 1, furthercomprising: an acoustic chamber corresponding to the speaker within thehousing, wherein the first path is extended from a first exit of theacoustic chamber, and wherein the second path is extended from a secondexit of the acoustic chamber.
 15. The electronic device of claim 1,wherein the opening is extended from a first portion to a secondportion, wherein the first path is configured to guide a sound of thespeaker to the first portion of the opening, and wherein the second pathis configured to guide the sound of the speaker to the second portion ofthe opening.
 16. The electronic device of claim 1, wherein the sensor ispositioned within a closed curve line passing through the first path,the second path, and the opening.
 17. The electronic device of claim 1,further comprising: a protection layer attached to a back surface of thedisplay, wherein the protection layer comprises a cutout portion formeda portion of a boundary thereof, and wherein the first path or thesecond path comprises a space that is guaranteed by the cutout portion.18. The electronic device of claim 1, wherein the sensor comprises atleast one of an image sensor, a proximity sensor, or an illuminancesensor.
 19. The electronic device of claim 1, wherein the sensor is animage sensor of a camera positioned within the housing, and wherein thedisplay comprises an opening corresponding an angle of view of thecamera.
 20. The electronic device of claim 1, wherein the first path andthe second path are separated from each other, and wherein the firstpath and the second path are configured to output sounds of differentregisters, respectively.
 21. The electronic device of claim 20, furthercomprising: a first driver responsible for a low register is connectedto the first path; and a second diver responsible for a high register isconnected to the second path.
 22. The electronic device of claim 21,further comprising: a first depressed portion providing the first pathis configured in a first shape appropriate for emitting a sound of thelow register; and a second depressed portion providing the second pathis configured in a second shape appropriate for emitting a sound of thehigh register.